Internal-combustion engine



, 1,612,917 1927- F. M. GRIMES INTERNAL COMBUSTION ENGINE 2 Sheets-Sheet 1 Filed July 51. 1926 1,612 917 Jan. 4, 1927. F M. GRIMES INTERNAL COMBUSTIONENGINE 2 Sheets-Sheet 2 Filed July 31. 1926 L I 4 1 Qwwnbz 1 F/Zfirz'r'nea Patented Jan. 4, 1 927.

UNITED STATES; rarur oFFicE.

FRANK- MARION GBIMES, or nnnomo, KANSAS, AssIGNoa or one-HALF To my 2. mean. or wronrra, KANSAS.

INTEBNAL-COIBUISTION ENGINE.

Application filed July 81, 1928. Serial No. 128,190.

This invention relates to new and useful improvements in internal combustion. engines, the main object being to provide an improved connection between the piston rods of the engine and the crank shaft, whereby to increase the driving power of the pistons.

Another object of my invention is the provision of' an improved connection between the piston rods of an internal combustion engine and the crank shaft, whereby instead of utilizing the push and pull motion which is common in internal combustion engines between the piston rods and crank shaft, a direct steady pull is imparted to the cranks of the crank shaft, which will increase the driving power. a 7 With the above and other objects in View the invention consists in the novel features .of construction, the combination and ar- 'rangement of parts hereinafter more fully set forth, pointed out in the claims and shown in the accompanying drawings, in which:

Figure 1 is a sectional side elevation of my invention applied to an engine.

Figure 2 is a plan view on the line 2-2 of Fig. 1,-and

Figure 3 is a detail view of one of the connecting rods.

' Referring more particularly to the drawings, the numeral 1 indicates the crank case of an internal combustion engine having the cylinders 2 mounted above the same and provided with the usual pistons 3 to which are connected the rods 4. The usual crank shaft 5 is provided, having the oppositely disposed cranks 6 therein and arranged parallel with them directly beneath the crank shaft is a bearing shaft 7.

In order to connect the piston rods'with the cranks 6 of the crank shaft 5, to provide a direct steady pull upon the crank shaft, I provide substantially triangular .shaped plates 8, one arranged upon each side of the bearing shaft 7, and each havin one of its angles pivotally mounted upon the bearing shaft as shown in Figure 1. In Figure 2, I have illustrated the plates disposed in a normal horizontal position and each piston rod has. its lower end bifurcated to form spaced arms 9, which extend downwardly upon opposite sides of the plate and are 'pivotally connected to one of the angles as shown at 10; the bifurcations being of a length-sufficient to permit free movement of one end of the plate therethrough, in accordance with the length of stroke of the p ston so that. the movements of either the plate or the rod will not beinterfered with. Each plate 8 is connected at its uppermost angle with one of the cranks 6 through the medium of a connecting rod 11, each end of the rod being pivotally connected to the crank and plate respectively. It will be apparent from the foregoing that a direct pull is imparted to the crank shaft upon each power stroke of a piston rod, whereas in the ordinary type of internal combustion engine, it is necessary for theipower stroke of the piston to carry the crank around on a push and pull movement of the piston rod, Whereas with the present construction illustrated in the accompanying drawings, it will be noted that each crank of the crank shaft receives a direct pull from each power stroke of the piston rods. Thus, as I have provided direct connection between two piston rods and each crank of the engine, it will be noted that as one rod is moving downwardly u on its power stroke, impartlng a direct pulF on the crank shaft, the other piston rod is moving on its exhaust stroke ready to receive a new firing charge and be moved on its power stroke. Therefore, the ower stroke of each piston imparts a hal turn to each crank, whereby the two power strokes of the two pistons impart a complete rotation to the crank.

It will be ap arent that by providing a connection of t s 'type whereby an even steady pull is provided between the piston rods andv the crank shaft, it will reduce the usual loosening of the connecting rod connections and thus reduce the wear on the bearings, which usually takes place with the ordinary ty e of internal combustion engine and thus re uces the expense of maintaining a motor in operation. It will also be apparent that the increase in the cost of production of a motor of this type is small in comparison with the increase in the efliciency and power and it is believed that it can be manufactured and placed on the market at a comparatively reasonable cost.

Itwill be apparent that by connecting the piston rods to the crank shaft in this manner, I have reduced the friction to a minimum and eliminated to a great extent the duced a substantially irect thrust of the iuc d rod and the device can be used equally as well with two, four, six, eight; or any equal number of pistons.

While I have shown and described the preferred embodiment of my invention it will be apparent that various changes and alterations may be carriedout without departing from the spirit of the invention or the scope of the appended claims.

I claim: 1. In an internal combustion engine, a

crank shaft, a bearing shaft arranged beneath and lying parallel therewith, pistons mounted for reciprocating movement upon each'side of the shafts, triangular plates upon opposite sides of the bearing shaft and having one angle loosely connected therewith, means forming pivotal connection between the pistons and one of the other angles of the plates and connecting rods between the remaining angles of the plates and the cranks of the crank shaft.

2. In an internal combustion engine, a-

crank shaft, a bearing shaft arranged beneath and parallel therewith, pistons mounted for reciprocating movement upon each side of the crank shaft, piston rods connected with the pistons and having their outer .ends bifurcated to form spaced arms, substantially triangular shaped connecting plates having one of their angles pivotally mounted upon the bearing shaft, means pivotally connecting the arms of the piston rods with one of the other angles of the plates,

movement upon each side of the crank shaft,

piston rods for said pistons having'bifurcated outer ends to form spaced arms, connecting plates mounted for pivotal movement' upon said bearing shaft, means forming pivotal connection between the arms of the piston rods and the vplates and means forming connection between the cranks of the crank shaft and said plates, as and for the purpose set forth.

In testimony whereof I hereunto afiix my signature.

:FRANK MARION GRIMES. 

